Refrigerator



FIG. 1 is a perspective view of a refrigerator showing the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side elevational view thereof, wherein the left side is a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

We claim the ornamental design for a refrigerator, as shown and described. 